|
heath groundsel, wood groundsel, woodland groundsel, woodland ragwort
|
California groundsel, chaparral ragwort, rayless ragwort
|
| Annuals, (15–)30–80+ cm (taproots fibrous-rooted). |
Annuals, 5–20+ cm (taproots relatively short and thin). |
puberulent (hairs abundant, curly). |
glabrous or sparsely tomentose (especially distally). |
single. |
usually 1 (relatively thin, delicate). |
evenly distributed; petiolate; blades obovate to oblong, 3–7(–12) × 1–3(–4) cm, usually 1–2-pinnate, bases tapered, ultimate margins dentate (distal leaves similar, clasping, bractlike). |
evenly distributed; sessile; blades oblanceolate to lance-linear, 2–4 × 0.5–1 cm, bases sometimes weakly clasping, margins usually subpinnate to dentate, sometimes subentire (distal leaves bractlike). |
0 or 1–8+; corolla laminae usually 1–2+ mm (barely surpassing phyllaries). |
0 or 1–5; corolla laminae 0.5–1+ mm (barely surpassing phyllaries, heads perhaps technically disciform). |
± 13 (± 21), 4–7+ mm, tips greenish or minutely black. |
± 8 or ± 13, 5–6 mm, tips greenish. |
0 or of 1–5+ linear to filiform bractlets. |
0 or of 1–3+ lance-deltate bractlets. |
12–24 in corymbiform arrays. |
4–10+ in open, cymiform arrays. |
hairy (especially on angles). |
densely hairy. |
= 40. |
= 40. |
|
|
|
|
| Flowering late spring–summer (northern areas of cool, climate); winter (southern areas). |
Flowering late winter–spring. |
| Mildly disturbed woodlands, open, sandy sites |
Dry, open ground, especially alkaline flats |
| 100–300 m (300–1000 ft) |
10–400 m (0–1300 ft) |
|
CA; LA; MA; MI; NJ; OH; OR; PA; WA; WI; BC; NB; NF; NS; PE; QC; Eurasia [Introduced in North America]
|
CA; Mexico (Baja California)
|
Senecio sylvaticus is a Eurasian weed that favors cool, wet climates. It is well established in coastal areas of the Pacific Coast and in parts of Newfoundland and Quebec; elsewhere in the flora, it appears to be sporadic. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 20, p. 563. |
FNA vol. 20, p. 563. |
| Asteraceae > tribe Senecioneae > Senecio |
Asteraceae > tribe Senecioneae > Senecio |
S. actinella, S. amplectens, S. ampullaceus, S. aphanactis, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. cannabifolius, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii |
S. actinella, S. amplectens, S. ampullaceus, S. arizonicus, S. aronicoides, S. astephanus, S. atratus, S. bigelovii, S. blochmaniae, S. californicus, S. cannabifolius, S. clarkianus, S. crassulus, S. elegans, S. elmeri, S. eremophilus, S. ertterae, S. erucifolius, S. flaccidus, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. jacobaea, S. lemmonii, S. lugens, S. lyonii, S. megacephalus, S. mohavensis, S. multidentatus, S. neowebsteri, S. parryi, S. pattersonensis, S. pseudoarnica, S. pudicus, S. quaylei, S. rapifolius, S. riddellii, S. sacramentanus, S. scorzonella, S. serra, S. sheldonensis, S. soldanella, S. spartioides, S. sphaerocephalus, S. spribillei, S. squalidus, S. sylvaticus, S. taraxacoides, S. triangularis, S. viscosus, S. vulgaris, S. warnockii, S. wootonii |
| Linnaeus: Sp. Pl. 2: 868. (1753) |
Greene: Pittonia 1: 220. (1888) |
| |
BC, 
CA, 
OR, 
WA
Flora NW, 
Go Botany, 
LA Plants, 
MI Flora, 
PNW Herbaria
WildflowerSearch
iNaturalist (observations)
USDA Plants Database
